<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			
			/**
			var a = 123;
			function test(){
				var b = 134;
				function demo(){
					var c = 234;
					document.write(b);
					document.write(a);
				}
				demo();
			}
			test();
			*/
			
		</script>
	</body>
</html>
